Why my active rigid bodies are vibrating Continuously?
One factor that can considerably affect the Rigid Body behaviour and stability is the Scale of the objects in the scene. Where possibly you should always Apply Scale on each of the objects after you have rescaled them. This will also ensure that it behaves appropriate to its actual size rather than it's pre-scaled size and weight.

In addition, you can drastically improve the stability of the rigid body simulation by increasing the number of Iterations on the Rigid Body properties panel.



The default value is 10 and this is fine for crude simulations. Higher values provide more accurate simulations  but will take longer to simulate. Increase the number of iterations until the simulation is stable. I created a test scene with a single domino and found that increasing Iterations to 500 was plenty enough to avoid jittering without significantly affecting the simulation time.